She is an excellent student in our class and she always herself in her studies.A. hidesB.

问题补充：

She is an excellent student in our class, and she always herself in her studies.

A. hides

B. buries

C. covers

D. leaves

答案：

A. hides

(答案→)B. buries

C. covers

D. leaves

解析：考查词组：bury oneself in doing埋头做…专心做，其他没有此意，句意：在我们班她是优秀的学生，总是专心学习，选B。